Abstract
Magnetorheological (MR) absorbers in the artillery recoil systems are usually used to dissipate the impact energy as much as possible and reduce the recoil force transmitted to the artillery carriage, while the firing stability of artillery during buffer process is rarely considered. In this paper, we analyzed the firing stability characteristics of the fixed artillery and the field artillery systems and established corresponding mechanical models. Then, we proposed the ideal recoil F-v curves of these two kinds of artillery respectively. The “platform effect” of recoil curve was taken as the recoil force control target of the fixed artillery, while based on the firing stability, the linear segmented recoil curve was drawn up as the ideal recoil buffer control target of the field artillery. To verify the feasibility and controllability of the designed multi-stage MR absorber in two kinds of recoil buffer system, the impact tests were conducted under different current loadings. The test results show that the designed MR absorber can realize different buffer control effects by changing the input current, but the ideal “platform effect” recoil curve of the fixed artillery cannot be completely realized due to small controllable damping force output. In the field artillery recoil system, the MR absorber can realize ideal recoil buffer control in the range of 0 to 25 degree firing angles.
Highlights
The recoil force produced by the artillery firing can impart substantial vibrations and affect the fatigue life of the structure (Bhatnagar, 2005)
Bajkowski and Bajkowski (2012) installed the MR absorber in the 7.62mm AKMS automatic carbine recoil system in 2012 to realize stable dissipation of the firing impact energy, so that the impact recoil force transmitted to the shoulder of the shooter was small, and the firing stability and comfort were improved at the same time
This means that the coulomb damping force Fτ is too small to achieve the soft buffer control, and the MR absorber cannot completely consume the recoil impact energy without The above analysis shows that the designed MR absorber rebound in a given recoil stroke
Summary
The recoil force produced by the artillery firing can impart substantial vibrations and affect the fatigue life of the structure (Bhatnagar, 2005). Since the different firing angles of artillery do not have much influence on the performance analysis of the MR absorber, the additional recoil resistance caused by the component of gravity in the recoil motion direction can be considered together with the friction term of the recoil system, so only the horizontal impact test was conducted here. When processing the test results, we try to choose the test data with the same maximum impact velocity; here, 3.5 m/s was selected as the impact test condition, to ensure the same initial impact energy
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